Lighting system.



M. UNGBR.

LIGHTING SYSTEM.

AfPLIOAfl'ION-FILBD JAN. 10,1907.v

2 SHEETS-SHEET 1.

mmm.

A magnetl() and set arm ll in motion. So

net l and draw doWnthe i? lamps 6 and 7 and thereby introduce these t powerfully eneroize electromagl l l l I vibratory arm l1 .l an'd thus open the path in parallel with the l l l l lamps in series with their respective groups of lour. lVhen the arm 1l moves out ot contact with the conductor 20 the energizing `electromzugmet 10 suffers a diminution of current because of the introduction of the regulating lamps in series therewith; this pei'- mits the return of arm ll to its initial position. If the voltage is low electromagnet ,10 is relatively weak and vibratory arm ll stays in contact with conductor 2O a good proportion of the time; if the voltage is normal ora little high, electromagnet l() will be strong and keep the vibratory arm out of contact with conductor for a good proportion of the time. By properly proportioning the electromagnet l() and the controlling spring 2l, the current through the main lamps of the car may be regulated to within a few hundredths of an ampere, and the light distributed by the four lamps olf each series may be maintained substantially constant irrespective ot' variations in the voltage ot' the traction system.

Fig. illustrates one manner of assembling the various elements described in connection with. Fig. l. The main lighting lamps of the car are not shown, but the vfour regulating Vlamps (3', 7, 8 ,and t) aremounted on a single panel A22 suitable Yfor mounting in any convenient place in the` car. The automatic cutouts l2, l, ll and l l5 may bd of ordinary type as shown, provided with armatures 23 carried on conductive strips or springs 24. The series cut-out ll) is ol" similar type, but the vibratory regulator is preferably more delicate in adjustment and capable of greaterregulating range. 'lhis regulator may comprise an cleciromagnet lt) having a movable core held in position by a set screw 26. 'l`he vij bi'atory arm of contact member ll carries an arniature 27 and is pivotally supported to a rigid'standard to which it is electrically connected by a llexible conductor 2i). '.llhc down ard movement of this vibratory arln may be regulated 'by adjusting the screw it), and ihc upward. movement may be regulated by a spring stop 3l held in position by suitable adjusting means 32. 'l`his stop serves also as means for completing the circuit through the vibrator-y arm ll according to the general scheme illustrated diagrammatically in Fig. l. Suitable adjusting means 33 are provided for regulating the tension olf spring 2l.

To avoid complications in the drawings,

l l l stantially constant illumination by the rethe electrical connections have been omitted from Figs. 2 and 3 but the several parts bear the same reference numerals as the corresponding parts in Fig. l, to which reference may rtherefore be conveniently made for details of the circuit used. This system of lamp regulation is applicable to either alternating current or direct current systems.

W'hat I claim as new and desire to secure by Letters Patent of the United States, is,-.

l. The combination with a source of electrical energy subject to material fluctuations in voltage, of lamps receiving energy yfrom said source, and vibratory means responsive to variation in voltageon said source and cooperating with at least one ot' said lamps to maintain substantially constant light from other lamps of the system.

2. The combination. with a source of powersubject to substantial fluctuations in voltage, of a plurality of lamps disposed in series and receiving energy from said source, a resistance in series with said lamps, and vibrating means responsive to variations in voltage on said source for automatically regulating the voltage across said resistance to maintain substantially constantlight from i said lamps.

The combination with a circuit and an electric lamp connected across said circuit, of a resistance in sei'ies with said lamp, and current responsive regulating means connected across said circuit to intermittently cut said resistance out of circuit in response to variations ol voltage on said circuit and thereby maintain said lamp at substantially uniform brilliancy.

il, The combination with an electric lamp connected across a circuit, of a resistance in series with said lamp, a vibratory contact for intermittently short-circuiting said rc-` sistance, and an electromagnet connected across said circuit and arranged te vibrate said contact in response to voltage across said circuit.

5. lhe combination with acircuit and an of a resistance in series with said lamp, an

in series with said resistance, and a vibratory armature for said electromagnet arranged to control a sh'unt circuit around said resistance.

6. 'lhe combination with a inain circuit, and a plurality of lamps connected in series across said circuit, of a vibratory Contact i'or controlling a shunt circuit around part olf said lamps, and contact vibrating means dependent on current and connected across the main circuit whereby the vibration of said Contact depends on the voltage on said main circuit and is controlled to maintain siihmainder ot' said lamps.

i 'electric' lamp connected across said circuit,

l contact actuating means dependent- `on cur- 7. The combination Wit-h main c and. a plurality of lamps connected in series across said circuit, of a vibratcrj; contactarranged to intermittently open and close a shunt circuit around one of said lamps, and

rent and connected across said main circuit in series with said. lamp whereby said ccntact is Vibratori to maintain constant. voltage across the remainder the lamps,

8. The combination Witl a main' circuit and a plurality of lamps connected across said circuit7 of an electromagnet-'connected across said circuiti in series with one of said lamps, a short circuit around the lamp with which said. electromagnet. is in series, and. a

shunt circuit and responsive, to said electropluralitv of lamps receiving magnet, whereby said shuncircnit is intermittently openedl and closed and substantially constant Voltage thereby automatically maintained across the remainder of the lamps.

9. The combination of a plurality ol lamps connected in series, a regulating lamp I in circuit therewith,` an electroinagnet in l shunt with said series of lamps and a vibra.- l tory conductor for automatically varying the l voltage across said regulating lamp to main- Vibratory armature connected to control saitl tain substantially constant current in the other lamps.

10, The combination with the power conductors of a traction system, a plurality of lamps connected across sud conductors, an electroinagnet in shunt with said lamps and l a vibratoiin parallel with at least one ol said lanips for autefi'iatically voltage on the other lamps.

l1. The combination with conductors ci a traction system, of a plurality of series circuits connected between said conductors cach regulating the containing a/plnlalit)Y oi lamps, a Viln-atingv regulator, and automatic means for varying the resistance in parallel with said vibratingh regulator to correspond -Witli the number olf lamps in operation. l i2. The cmnbination with a power circuit sloiject to material changes in voltage, a l energy therel from, avibraling member lol: regulating the l voltage on said lamps, and meansl For automatically varyingl the resista-nec in parallel i with said vibrating member to correspond with the numbeil of lamps in circuit. i 13. 'lhe coinl'iination oit a source of power, i a circuit supplied tl'ierefrom containingr al the eli'ec ive voltage on said ydevi plurality ol1V lainns in series, means lor regu- A lumps.

, and means vl'or discontinning;` the regulating;

act'on upon cessation nl current in the lamps.

l-l.. rlfhe combination oit a pluraluiY ol en cuits each containing' lumps in series, means 'for regulating' the el'lectirc roltage on lamps 1n each or sind circuits. und automatic means lor :liscontinuing the regrjulatinny action on any one of said circuits upon cessation oli current in met circuit.

l5. The combination ol a lamp circuit containingl n plurality of lamps, a device in circuit Witn said lamps, means for periodically shuntiing said device. and means for discontinuing,T the periodic sliuntii'igi of said device upon cessation ol current in said cir-- cuil'. lo. The combination ol! a circuit containing lamps to be regulated, a device in said circuit possessing resistance, means lor varying; the eilective drop in voltage across sait e, and automatic means for interrupting he action ot the 'rst mentioned nieans.

1T. rl`lie combination olf a circuit containing a plurality7 ot' lamps in series, a regnlatin` lamp also in said cy uit, a Vibrator for periodicallyv short circuiling or shuntinp; said regulating lamp, and a cut-out for interrupting a connection between said vibrator and said regulating' lamp.

1S. The combination of a pluralil.)T of lighting. circuits connected lo the same source of powe/r, lamps in each of said circuit', a regulating` lamp in each circuit, a device for varying' the voilage consumed by the regulating lamps, and means for disconncctiiul` any one ot said circuits ironi said device upon cessation ot current in said circuit.

ISL The combination with u source oli g power subliect lo substantial llucluutions in voltage. oi' a plurality of lighting' circuits ,supplied with eucl'gr) thereironi and each containing lamps in series. and a snigle vibratoir means for regulatingY the voltage across some ol said lamps to maiuiain substantially constant light Afrom the other lamps.

ln witness \\'heieoi`. l have hereunto set my hund this Sth day olt January, 1907.

lGNl'lf'l UN llll{ Humm nroun. 

